Power conversion circuit, server power supply, method, device, product, and medium

Abstract

The application discloses a power supply conversion circuit, a server power supply, a method, equipment, products and media, relates to the technical field of server power supply, and realizes the switching of the working mode of the power supply mode for different input power supplies through a multi-mode conversion module. It can meet the mode switching for different input voltages under the direct current power supply of the server to improve the conversion efficiency, and can also be compatible with the alternating current input power supply scene. In the alternating current input scene, efficient power conversion can also be realized. The technical problem of the inherent conduction loss of the rectifier bridge in the related art, unnecessary voltage conversion of the PFC circuit, and additional energy loss are solved. The power conversion efficiency is improved under the two power supply modes of direct current power supply and alternating current power supply, and the beneficial effects of meeting the high energy efficiency requirements of server applications are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of server power supply, and in particular to a power supply conversion circuit, a server power supply, a method, an equipment, a product and a medium. BACKGROUND

[0002] At present, the redundant power supply architecture of the server room mainly adopts a dual power supply scheme of two 220Vac alternating currents or one 220Vac and one 240Vdc high-voltage direct current. A small number of rooms use a 336Vdc or higher voltage direct current power supply system. Since the data center is generally based on alternating current power supply supplemented by a small amount of high-voltage direct current power supply, the common server power supply is usually designed based on alternating current input and compatible with 240Vdc direct current input to meet the two power supply environments with a single power supply.

[0003] For 336Vdc or higher voltage direct current power supply, a special power supply needs to be designed. Although such a power supply has little difference in overall topology from an alternating current power supply, the main adjustment is concentrated on the power supply connector and the safety design. However, while being compatible with AC and DC inputs, it is difficult to fully exert the energy efficiency advantage under pure direct current power supply. Especially under the condition of 336Vdc direct current input, limited by the original bridge rectifier and power factor correction (PFC) circuit reserved for compatibility with alternating current, the inherent conduction loss of the rectifier bridge cannot be avoided, and the PFC circuit cannot be disconnected or bypassed in direct current mode, still performing unnecessary voltage conversion, resulting in additional energy loss.

[0004] Therefore, how to provide a solution to the above technical problems is a problem that those skilled in the art need to solve at present. SUMMARY

[0005] The present application provides a power supply conversion circuit, a server power supply, a method, an equipment, a product and a medium to at least solve the problem that the inherent conduction loss of the rectifier bridge cannot be avoided, the PFC circuit performs unnecessary voltage conversion, and additional energy loss occurs in the related art.

[0006] The present application provides a power supply conversion circuit, comprising: an input detection module connected with an input power supply and configured to sample a voltage signal of the input power supply; a multi-modal conversion module comprising a plurality of switch tubes and configured to switch to a corresponding working mode in response to a control signal; a control module electrically connected with the input detection module and the multi-modal conversion module, configured to receive the voltage signal, identify the power supply mode of the input power supply based on the voltage signal, determine the working mode of the multi-modal conversion module according to the power supply mode, and generate a plurality of driving signals corresponding to the working mode to control the switching state of the plurality of switch tubes in the multi-modal conversion module.

[0007] The application also provides a server power supply, comprising a primary side power supply control module and a secondary side power supply control module, wherein the primary side power supply control module comprises the power supply conversion circuit according to any one of the preceding embodiments.

[0008] The application also provides a control method of a server power supply, wherein the server power supply comprises the power supply conversion circuit according to any one of the preceding embodiments, and the control method comprises: obtaining an input voltage signal of the power supply conversion circuit; determining a target working mode from a plurality of preset working modes according to the input voltage signal; generating a plurality of driving signals based on the target working mode and applying the driving signals to a multi-mode conversion module of the power supply conversion circuit, so that the multi-mode conversion module is switched to the target working mode.

[0009] The application also provides a computer program product, comprising computer programs / instructions, which, when executed by a processor, implement the steps of the control method of the server power supply.

[0010] The application also provides an electronic device, comprising: a memory for storing computer programs; and a processor for executing the computer programs to implement the steps of the control method of the server power supply.

[0011] The application also provides a computer readable storage medium, wherein the computer readable storage medium stores computer programs, and the computer programs, when executed by a processor, implement the steps of the control method of the server power supply.

[0012] According to the application, the working mode of the power supply mode for different input power is switched by a multi-mode conversion module, which can not only meet the mode switching for different input voltages under server direct current power supply to improve the conversion efficiency, but also be compatible with alternating current input power supply scenarios, and can also realize efficient power conversion under alternating current input scenarios. The technical problem that the inherent conduction loss of the rectifier bridge cannot be avoided, the PFC circuit performs unnecessary voltage conversion, and additional energy loss is caused in the related art is solved, the power conversion efficiency under the two power supply modes of direct current power supply and alternating current power supply is improved, and the beneficial effects of meeting the high energy efficiency requirements of server applications are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1A structural schematic diagram of a power supply conversion circuit provided by an embodiment of the present application.

[0015] Figure 2 A structural schematic diagram of another power supply conversion circuit provided by an embodiment of the present application.

[0016] Figure 3 A structural schematic diagram of a server power supply provided by an embodiment of the present application.

[0017] Figure 4 A step flowchart of a control method of a server power supply provided by an embodiment of the present application.

[0018] Figure 5 A step flowchart of another control method of a server power supply provided by an embodiment of the present application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, any other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0020] It should be noted that, in the description of the present application, the terms “comprise”, “contain” or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. The terms “first”, “second” and the like in the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence.

[0021] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0022] Please refer to Figure 1 The present embodiment provides a power supply conversion circuit, comprising: an input detection module 1 connected with an input power supply and configured to sample a voltage signal of the input power supply; a multi-modal conversion module 2 comprising a plurality of switch tubes and configured to switch to a corresponding working mode in response to a control signal; a control module 3 electrically connected with the input detection module 1 and the multi-modal conversion module 2 and configured to receive the voltage signal, identify a power supply mode of the input power supply based on the voltage signal, determine a working mode of the multi-modal conversion module 2 according to the power supply mode, and generate a plurality of driving signals corresponding to the working mode to control the switching state of the plurality of switch tubes in the multi-modal conversion module 2.

[0023] In this embodiment, the power supply conversion circuit at least includes an input detection module 1, a multi-modal conversion module 2, and a control module 3. The input detection module 1 is directly connected with the L terminal and the N terminal of the input power supply, and is used for periodically sampling the voltage signal of the input power supply. The voltage signal can be used to determine the type and power supply mode of the input power supply. The input detection module 1 can include an EMI (Electromagnetic Interference) filter circuit to suppress electromagnetic interference. In a specific implementation, a resistance voltage dividing network combined with a voltage follower circuit can be used to convert a high-voltage input signal into a low-voltage signal that can be processed by the control module 3.

[0024] The multi-modal conversion module 2 is composed of multiple switch tubes, the input end of which is connected with the input power supply through the input detection module 1, and the output end is connected with a subsequent voltage conversion circuit (such as a DC-DC conversion structure on the secondary side). The control end of each switch tube in the multi-modal conversion module 2 is connected with the control module 3. The control module 3 determines whether the input power supply is an alternating current or a direct current type based on the voltage signal characteristics (such as waveform continuity, amplitude range, etc.) of the input power supply, and identifies the power supply mode, generates multiple driving signals accordingly, and controls the on-off state of each switch tube in the multi-modal conversion module 2, so as to realize the switching of the working mode. The multi-modal conversion module 2 supports multiple working modes including a rectification and boost mode for adapting to alternating current power supply, a short-through mode for adapting to direct current power supply, and a direct current boost mode, etc.

[0025] The control module 3 can be implemented by using an MCU (Microcontroller Unit) or a special PWM (Pulse Width Modulation) controller chip. The ADC pin of the control module 3 is connected with the output of the input detection module 1 to receive the sampling signal. The GPIO (General-Purpose Input / Output) or the special driving pin is connected with the control end of each switch tube in the multi-modal conversion module 2 to output the corresponding driving signal.

[0026] The power supply conversion circuit provided in this embodiment has a flexible structure, can automatically identify alternating current / direct current input types and switch corresponding working modes, and has strong compatibility and adaptability. The circuit realizes the support of a single hardware platform for multiple power supply modes, reduces the system complexity and the dependence on external adaptive devices, and can be widely applied to power supply occasions requiring alternating current / direct current intelligent switching.

[0027] As an optional embodiment, all switch tube driving is performed by using an optical coupler or a special driving chip for level shifting and isolation protection.

[0028] The embodiment realizes automatic identification and seamless conversion of AC / DC input power through a multi-modal adaptive switching mechanism, greatly improving power supply compatibility (supporting 85V-265V AC or 100V-400V DC input); secondly, active switching tubes are used to replace traditional diode rectifier bridges, significantly reducing the conduction loss of the rectification link, suitable for high-current application scenarios, and the control module 3 is based on a voltage feature identification scheme, avoiding the need for additional hardware detection circuits, while ensuring reliability and reducing system cost and complexity, providing a high-performance power supply solution for new hybrid power supply equipment.

[0029] In an exemplary embodiment, the control module 3 is specifically configured to determine the working mode as an AC rectification and boost mode if the identified power supply mode of the input power supply is an AC power supply mode, determine the working mode as a DC short path mode if the identified power supply mode of the input power supply is a first DC power supply mode, and determine the working mode as a DC boost mode if the identified power supply mode of the input power supply is a second DC power supply mode, the voltage signal of the DC power supply of the first DC power supply mode being within a first preset range, and the voltage signal of the DC power supply of the second DC power supply mode being lower than the lower limit value of the first preset range.

[0030] In the embodiment, the control module 3 accurately identifies the power supply mode by real-time analysis of the voltage signal sampled by the input detection module 1. The identification method includes but is not limited to determining the AC power supply mode if the sampled voltage signal presents periodic zero-crossing and has continuous alternating characteristics; determining the DC power supply mode if the voltage signal amplitude is stable and has no zero-crossing phenomenon. For the DC power supply mode, the voltage amplitude is further measured by ADC: if the voltage is within the first preset range, it is identified as the first DC power supply mode; if the voltage is lower than the lower limit of the first preset range, it is identified as the second DC power supply mode.

[0031] The control module 3 outputs corresponding PWM drive signals according to the above determination results to control the on-off combination of the switching tubes in the multi-modal conversion module 2: in the AC rectification and boost mode, the switching tubes are controlled to form a full-bridge or half-bridge rectifier circuit and perform power factor correction; in the first DC power supply mode, some of the switching tubes are controlled to be continuously conductive to realize a short path; in the second DC power supply mode, the switching tubes are controlled to perform Boost boost conversion to raise the lower input voltage to the required bus voltage.

[0032] The embodiment has wide-range input voltage adaptive capability, can automatically and accurately distinguish between AC and DC input, and further identify the DC voltage level without manual setting, significantly improving device compatibility and user experience. Through modal intelligent switching, efficient energy conversion can be achieved in different power supply modes, including rectification and PFC boost in AC, low-loss straight-through in DC high voltage, and boost regulation in DC low voltage, with optimized overall system efficiency.

[0033] Reference is made to Figure 2 In an exemplary embodiment, the multi-modal conversion module 2 comprises:

[0034] a mode switching unit comprising a first switch Q1 and a second switch Q2, a first end of the first switch Q1 and a first end of the second switch Q2 are connected, a control end of the first switch Q1 and a control end of the second switch Q2 are connected with the control module 3; a voltage regulating unit comprising three bridge arms, each bridge arm comprises an upper switch and a lower switch, a second end of the first switch Q1 is connected with a common end of the upper switch and the lower switch in the first bridge arm, a second end of the second switch Q2 is connected with a common end of the upper switch and the lower switch in the second bridge arm, a control end of each switch is connected with the control module.

[0035] In an exemplary embodiment, the multi-modal conversion module 2 further comprises a first inductor and a second inductor, the first inductor is connected in parallel between the first end and the second end of the first switch Q1, the second inductor is connected in parallel between the first end and the second end of the second switch Q2.

[0036] In an exemplary embodiment, the multi-modal conversion module 2 further comprises a soft start unit, the soft start unit is arranged at the first common connection end of the three bridge arms or the second common connection end of the three bridge arms.

[0037] In an exemplary embodiment, the soft start unit comprises a third switch and a resistor connected in parallel with the third switch, the multi-modal conversion module 2 further comprises a capacitor, a first end of the capacitor is connected with the first common connection end, a second end of the capacitor is connected with the second common connection end.

[0038] In this embodiment, the soft start unit comprises a third switch and a resistor connected in parallel between the first end and the second end of the third switch, a second end of the third switch is connected with the second end of the three-phase bridge arm, a first end of the capacitor is connected with the first end of the three-phase bridge arm, a second end of the capacitor is connected with the first end of the third switch. A control end of the third switch is connected with the control module.

[0039] In this embodiment, the multi-modal conversion module 2 comprises a mode switching unit and a voltage regulating unit, the voltage regulating unit comprises three-phase bridge arms, the first ends of the bridge arms are connected with each other, the second ends of the bridge arms are connected with each other, each bridge arm comprises an upper switch and a lower switch, as Figure 2As shown, the upper switch tube and the lower switch tube of the first phase bridge arm are Q3 and Q4 respectively, the upper switch tube and the lower switch tube of the second phase bridge arm are Q5 and Q6 respectively, and the upper switch tube and the lower switch tube of the third phase bridge arm are Q7 and Q8 respectively. The first end of the upper switch tube of each phase bridge arm is the first end of each phase bridge arm, the second end of the lower switch tube of each phase bridge arm is the second end of each phase bridge arm, and in each phase bridge arm, the second end of the upper switch tube is connected to the first end of the lower switch tube, the second end of the first switch tube Q1 is connected to the midpoint of the first phase bridge arm, and the second end of the second switch tube Q2 is connected to the midpoint of the second phase bridge arm. It can be understood that the midpoint of each phase bridge arm is a point on the common end of the second end of the upper switch tube and the first end of the lower switch tube after connection. The control end of each switch tube (Q1-Q9) is respectively connected to the corresponding drive output end of the control module 3 to receive independent control signals. Q9 is the third switch tube in the soft start unit.

[0040] The above structure realizes flexible topology reconstruction of the multi-modal conversion module 2. The control module 3 can configure multiple working modes by controlling the on-off combination of the first switch tube Q1, the second switch tube Q2 and the switch tubes in the three-phase bridge arms: for example, when the input is alternating current, the corresponding switch tubes are controlled to form a PFC rectifier boost circuit; when the input is high-voltage direct current, the first switch tube Q1, the second switch tube Q2 and part of the bridge arm switch tubes are controlled to be conductive to realize a short-circuit through function; when the input is low-voltage direct current, the first switch tube Q1 and the second switch tube Q2 are controlled to be off, Q8 and Q9 are always closed, and the switch tubes Q3-Q6 are controlled to work in a Boost boost mode to boost the output voltage. Figure 2 In the embodiment, the control module 3 is configured to output control signals to the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5, the sixth switch tube Q6, the seventh switch tube Q7 and the eighth switch tube Q8. The control signals output by the control module 3 to the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5, the sixth switch tube Q6, the seventh switch tube Q7 and the eighth switch tube Q8 are represented by V1, V2, V3, V4, V5, V6, V7 and V8 respectively.

[0041] The multi-modal conversion module 2 provided in the embodiment adopts a structure combining a mode switching unit and a three-phase voltage regulation unit, and can realize multiple power conversion functions such as alternating current rectification, direct current through and direct current boost by only eight switch tubes, thereby effectively improving the power density and integration. The unified hardware structure can flexibly configure the working mode through software programming, thereby significantly enhancing the self-adaptive ability of the system to a wide range of input voltages, reducing the complexity and cost of the peripheral circuit, and being conducive to realizing high-efficiency energy conversion.

[0042] Specifically, the first inductor and the first switch Q1 are connected in parallel, and the second inductor and the second switch Q2 are connected in parallel. In the AC mode, the first switch Q1 and the second switch Q2 are always open, that is, they remain in the off state. The input current of the input power supply passes through the first inductor and the second inductor, and the first inductor and the second inductor are used as independent PFC boost inductors at this time. The control module 3 can control the switching tubes (such as the upper tube Q3 and the lower tube Q4) of the first phase bridge arm to perform high-frequency chopping to control the current flowing through L1. At the same time, the switching tubes (such as Q5 and Q6) of the second phase bridge arm are controlled to perform phase-interleaved (such as 180-degree phase difference) chopping to control the current flowing through L2, thereby realizing interleaved chopping control based on two inductors, and achieving high-efficiency, low-ripple power factor correction and rectification boost.

[0043] It can be understood that, in the initial stage of system power-on, the control module 3 controls the third switch to remain off. At this time, the current path can only charge the capacitor through the parallel resistor. Due to the current-limiting effect of the resistor, the charging current of the capacitor is limited within a safe range, thereby effectively suppressing the huge inrush current generated at the moment of power-on, preventing the impact on the input power supply and damaging the devices such as the front-stage rectifier bridge, fuse or switching tube. When the capacitor is charged to close to the target voltage, the control module 3 controls the third switch to be turned on. The third switch turned on shorts the resistor, and the current directly passes through the switching tube with low conduction impedance, thereby eliminating the continuous power consumption of the resistor and improving the overall efficiency of the system.

[0044] The embodiment realizes safe pre-charging of the bus capacitor by introducing a soft start unit composed of the third switch and the parallel resistor, effectively suppresses the power-on inrush current, and improves the reliability and safety of the system. At the same time, by bypassing the current-limiting resistor with the switching tube, unnecessary continuous power loss is avoided, and the system efficiency is taken into account. The design of the bus capacitor ensures voltage stability and guarantees efficient and stable operation of the multi-modal conversion module.

[0045] Please refer to Figure 3 The application also provides a server power supply, which comprises a primary-side power supply control module and a secondary-side power supply control module, and the primary-side power supply control module comprises the power conversion circuit according to any one of the preceding embodiments.

[0046] In the embodiment, the output end of the primary-side power supply control module is connected to the input end of the secondary-side power supply control module, so as to realize voltage transmission from the primary side to the secondary side.

[0047] Please refer to Figure 4 The application also provides a control method of a server power supply, and the server power supply comprises the power conversion circuit according to any one of the preceding embodiments. The control method of the server power supply in the embodiment is specifically realized by the control module of the power conversion circuit, and the control method of the server power supply comprises the following steps.

[0048] S101: Obtain the input voltage signal of the power conversion circuit.

[0049] This embodiment acquires the input voltage signal of the power conversion circuit to facilitate subsequent determination of the current power supply mode.

[0050] S102: Determine the target operating mode from a variety of preset operating modes based on the input voltage signal.

[0051] In this embodiment, based on the voltage signal acquired by S101, the optimal power conversion path is determined through a preset algorithm. Specifically, the time-domain and frequency-domain characteristics of the input voltage signal can be used as the basis for judgment. The main characteristics include the effective voltage value (RMS, Root Mean Square), waveform ripple coefficient, zero-crossing characteristics, and rate of change. Among them, the optional algorithm schemes for determining the target operating mode include: a) Threshold comparison method: calculate the effective voltage value and compare it with a preset voltage threshold (such as...). , The first method is simple and fast; the second method is frequency domain analysis: it analyzes the frequency components of the signal through FFT or zero-crossing detection to accurately distinguish between pure DC (without power frequency components) and rectified DC; the third method is machine learning recognition: it uses a trained lightweight model (such as a decision tree) to classify voltage waveform features, which is highly intelligent.

[0052] Taking a hybrid decision-making scheme combining threshold comparison and frequency domain analysis as an example: the control module acquires voltage signals at a preset rate. First, it calculates the most recent 100 effective voltage values ​​( Subsequently, the ripple characteristics of this waveform segment were analyzed: if significant ripple was detected, it was determined to be an AC input, and the target operating mode was determined to be the AC rectification boost mode. If the waveform is stable (fluctuations less than...), then... If the condition is met, then the decision will proceed to DC mode: Compared with two preset ranges, Then the target operating mode is determined to be the DC boost mode; if Then the target operating mode is determined to be the DC short-circuit mode.

[0053] S103: A multi-mode conversion module that generates multiple drive signals based on the target operating mode and applies them to the power supply conversion circuit so that the multi-mode conversion module switches to the target operating mode.

[0054] In the embodiment, the multi-channel drive signal refers to a set of PWM (pulse width modulation) waveforms that are coordinated with each other in terms of timing, phase and duty cycle, and the number of channels is determined by the number of switching tubes in the multi-mode conversion module (such as 4 channels or 6 channels in the embodiment). The optional schemes for generating the drive signal include: pre-storing a set of fixed PWM parameters (frequency, duty cycle, dead time) for each mode, selecting the PWM parameters to generate the drive signal according to the target working mode, and responding the fastest; dynamically calculating the optimal PWM parameters through a digital controller (such as PID (Proportional-Integral-Derivative, proportional-integral-derivative control)) according to the real-time feedback voltage / current value, generating the drive signal, and having the highest control accuracy; combining the fixed parameters and the real-time adjustment to ensure stability while optimizing dynamic performance.

[0055] In an example embodiment, the process of obtaining the input voltage signal of the power supply conversion circuit includes: obtaining the input voltage signal of the power supply conversion circuit in a preset time period; and the process of determining the target working mode from the preset plurality of working modes according to the input voltage signal includes: if the input voltage signal in the preset time period meets the AC determination condition, determining the target working mode as the AC rectification and boosting mode.

[0056] Further, the multi-mode conversion module includes a mode switching unit, a voltage regulation unit and a soft start unit, the mode switching unit includes a first switching tube and a second switching tube, the voltage regulation unit includes three bridge arms, each bridge arm includes an upper switching tube and a lower switching tube, and the soft start unit includes a third switching tube; based on the above embodiment, in combination with Figure 2 and Figure 5 The process of generating a multi-channel drive signal based on the target working mode and applying it to the multi-mode conversion module is described.

[0057] When the target working mode is the AC rectification and boosting mode, the first drive signal is output to the first switching tube and the second switching tube to make the first switching tube and the second switching tube conductive and non-conductive; the soft start drive signal is output to the third switching tube, and after completing the soft start, the second drive signal is output to the third switching tube to make the third switching tube conductive; the third drive signal is output to the target switching tube combination of the three bridge arms to perform the voltage conversion operation and / or the power factor correction operation.

[0058] In the AC input mode, the control module coordinates the management mode switching unit, voltage regulation unit and soft start unit to execute the complete process of AC rectification and boost mode. The preset time period refers to a time window set for accurate judgment of voltage characteristics (such as frequency and zero-crossing point), which can be set to 10-20 ms (i.e. half to one power frequency period). The AC determination condition generally refers to the existence of zero-crossing point and periodic sinusoidal variation of the sampled voltage signal within the time period, or the calculated ripple characteristics conform to the power frequency AC characteristics. The first drive signal is a drive signal for completely turning off the switch tube (in the normally open state). The soft start drive signal is a specific PWM signal or timing control signal, which aims to slowly increase the conduction degree of the third switch tube to limit the inrush current. The third drive signal is a group of complex PWM waveforms with strict phase relationship between each other, which is used to control the high-frequency switching action of multiple switch tubes in the voltage regulation unit to realize voltage conversion operation (such as Boost) and power factor correction operation PFC, so that the input current waveform follows the input voltage waveform and reduces harmonics.

[0059] Taking an input AC power supply as an example. The control module continuously acquires the voltage signal of the input power supply, and when detecting twice zero-crossing of the voltage and sinusoidal waveform within 20 ms, it is determined that the AC determination condition is met, and then it is determined that the multi-modal conversion module needs to be switched to the AC rectification and boost mode. The first drive signal is immediately output to the control end of the first and second switch tubes, so that S1 and S2 are kept continuously disconnected. At the same time, a PWM wave (soft start drive signal) with duty cycle gradually increasing from to is output to the gate of the third switch tube, which slowly reduces the conduction impedance and thus limits the inrush current to the large-capacity capacitor in the later stage. When the duty cycle reaches (i.e. full conduction), the control module changes to output the second drive signal continuously, so that the third switch tube is always closed.

[0060] Four high-frequency PWM signals (i.e. third drive signal) are output to the specific target switch tube combination in the three bridge arms. Among them, the two switch tubes in the first bridge arm are a group of high-frequency switch tubes, which are used as switch tubes for voltage boost and power factor correction current control, while the two switch tubes in the second bridge arm are switch tubes controlled in an interleaved manner with the two switch tubes in the first bridge arm, and the two switch tubes in the third bridge arm are power frequency switch tubes, which are switched based on the frequency of the AC power supply to realize voltage inversion of the AC power supply. In this working mode, the fixed conduction loss of the rectifier bridge is saved, and the energy efficiency is improved.

[0061] Specifically, the embodiment divides a complete AC cycle into two phases: positive half cycle and negative half cycle. The control module determines the current half cycle by input detection unit (such as detecting voltage zero crossing) and controls the frequency tubes Q7 and Q8 accordingly.

[0062] In the positive half cycle (L line is positive, N line is negative), the frequency tube state is Q7 closed and Q8 open, that is, a path for current from the switch node to N line is created. Among them, Q3 and Q5 (interleaved) are high-frequency PWM switching, and Q4 and Q6 are kept open. The current path is divided into two stages: when Q3 (or Q5) is turned on (energy storage stage), the current flows from L line→inductor L1→Q3→Q7→N line, at this time, the electrical energy is converted into magnetic energy and stored in inductor L1. When Q3 (or Q5) is turned off (energy release stage), due to the inductance current cannot be suddenly changed, L1 will generate an induced electromotive force, the polarity is left negative and right positive, the current flows from L line→L1→output diode (body diode of Q3 / Q5)→output capacitor and load→Q9 (closed)→returns to N line, at this time, L1 releases energy, which is superimposed with the input voltage to charge the output capacitor for the load. In the negative half cycle (L line is negative, N line is positive), the frequency tube state is Q8 closed and Q7 open, that is, a path for current from the switch node to L line is created. Among them, Q4 and Q6 (interleaved) are high-frequency PWM switching, and Q3 and Q5 are kept open. The current path is divided into two stages: when Q4 (or Q6) is turned on (energy storage stage), the current flows from N line→Q8→Q4→L1→L line, at this time, the electrical energy is also converted into magnetic energy and stored in inductor L1. When Q4 (or Q6) is turned off (energy release stage), L1 generates an induced electromotive force, the polarity is left positive and right negative, the current flows from N line→output capacitor and load→Q9→diode→L1→L line, L1 releases energy, which is superimposed with the input voltage to charge the output capacitor.

[0063] In an example embodiment, the process of obtaining the input voltage signal of the power supply conversion circuit includes: obtaining the input voltage signal of the power supply conversion circuit in a preset time period; and the process of determining the target working mode from the plurality of preset working modes according to the input voltage signal includes: if the input voltage signal in the preset time period meets the direct current determination condition, determining whether the input voltage signal is in a first preset range; if yes, determining that the target working mode is a direct current short-pass mode.

[0064] Further, the multi-mode conversion module comprises a mode switching unit, a voltage regulating unit and a soft start unit, the mode switching unit comprises a first switch tube and a second switch tube, the voltage regulating unit comprises three bridge arms, each bridge arm comprises an upper switch tube and a lower switch tube, and the soft start unit comprises a third switch tube; the process of generating the multi-path driving signal based on the target working mode and applying the multi-path driving signal to the multi-mode conversion module comprises: when the target working mode is the DC short-pass mode, outputting the second driving signal to the first switch tube, the second switch tube, the upper switch tube of the first bridge arm, the upper switch tube of the second bridge arm and the lower switch tube of the third bridge arm, so that the upper switch tube of the first bridge arm, the upper switch tube of the second bridge arm and the lower switch tube of the third bridge arm are turned on; and outputting the first driving signal to the lower switch tube of the first bridge arm, the lower switch tube of the second bridge arm and the upper switch tube of the third bridge arm, so that the lower switch tube of the first bridge arm, the lower switch tube of the second bridge arm and the upper switch tube of the third bridge arm are turned off.

[0065] In the embodiment, the first preset range is set to 360V to 420V. The control module detects that the input voltage is kept stable at 410V within 20ms and the fluctuation is less than 2V, determines that the input voltage meets the DC determination condition and is in the first preset range, and thus determines that the target working mode is the DC short-pass mode.

[0066] Subsequently, the control module generates the following specific driving signal combination and applies the driving signal combination to the multi-mode conversion module: constructs a pass-through path, outputs the second driving signal to the first switch tube and the second switch tube to turn on the first switch tube and the second switch tube, outputs the second driving signal to the gate of the upper switch tube of the first bridge arm, the upper switch tube of the second bridge arm and the lower switch tube of the third bridge arm to completely turn on the three switch tubes, and outputs the first driving signal to the lower switch tube of the first bridge arm, the lower switch tube of the second bridge arm and the upper switch tube of the third bridge arm to turn off the three switch tubes. In this structure, the DC power supply is directly delivered to the second-stage power conversion input, the first-stage power conversion is short-passed, the energy loss is only the conduction loss, there is no longer the fixed loss of the rectifier bridge and the first-stage loss in this working mode, and the overall working efficiency is significantly improved.

[0067] In the embodiment, when the high-voltage direct-current input, a low-loss path from the input to the output is constructed as directly as possible, completely bypassing the boost PFC stage requiring switch operation. Specifically, the embodiment controls Q1, Q2, Q3, Q5, Q8, and Q9 to be turned on, and the remaining switch tubes to be turned off. The positive electrode path is direct-current input positive electrode→Q1→Q3→directly to the input positive electrode of the second-stage power conversion, direct-current input positive electrode→Q2→Q5→directly to the input positive electrode of the second-stage power conversion, and the negative electrode path is direct-current input negative electrode→Q8→Q9→directly to the input negative electrode of the second-stage power conversion.

[0068] In an example embodiment, after determining whether the input voltage signal is in the first preset range, the control method of the server power supply further includes: if the input voltage signal is not in the first preset range, determining whether the input voltage signal is in a second preset range, the upper limit of the second preset range being less than the lower limit of the first preset range; if yes, determining that the target working mode is a direct-current boost mode.

[0069] Further, the multi-mode conversion module includes a mode switching unit, a voltage regulation unit, and a soft start unit. The mode switching unit includes a first switch tube and a second switch tube. The voltage regulation unit includes three bridge arms, each of which includes an upper switch tube and a lower switch tube. The soft start unit includes a third switch tube.

[0070] The process of generating the multi-path drive signal based on the target working mode and applying the multi-path drive signal to the multi-mode conversion module includes: when the target working mode is a direct-current boost mode, outputting a first drive signal to the first switch tube and the second switch tube to make the first switch tube and the second switch tube turn off; outputting a second drive signal to the third switch tube to make the third switch tube turn on; outputting the second drive signal to the lower switch tube of the third bridge arm to make the lower switch tube of the third bridge arm turn on; outputting the first drive signal to the upper switch tube of the third bridge arm to make the upper switch tube of the third bridge arm turn off; and outputting a fourth drive signal to the upper switch tube and the lower switch tube of the first bridge arm and the upper switch tube and the lower switch tube of the second bridge arm to control the upper switch tube and the lower switch tube of the first bridge arm to perform complementary switching operation and control the upper switch tube and the lower switch tube of the second bridge arm to perform complementary switching operation.

[0071] In the embodiment, the second preset range is a voltage interval, the upper limit (V_boost_max) of which is equal to the lower limit (V_boost_min) of the first preset range (e.g., 360V), and the lower limit of which is determined by the lowest input voltage at which the circuit can stably start the boost (e.g., 180V). If the input voltage is in this range, it indicates that the boost is needed to reach the target output voltage. The first preset range is 360V-420V, and the second preset range is 180V-360V. If the input voltage is in this range, it indicates that the boost is needed to reach the target output voltage. The first preset range is 360V-420V, and the second preset range is 180V-360V. ​The control module detects that the input voltage is 300V, meets the DC determination condition but is not in the first preset range but in the second preset range, and thus determines that the target working mode is the DC boost mode.

[0072] The control module outputs the first driving signal to the first switch tube and the second switch tube to make the first switch tube and the second switch tube be turned off, outputs the first driving signal to the upper switch tube of the third bridge arm to make the upper switch tube of the third bridge arm be turned off, controls the third switch tube and the lower switch tube of the third bridge arm to be always closed, and realizes voltage boost by the combination of the upper and lower switch tubes of the first bridge arm and the upper and lower switch tubes of the second bridge arm to reach the stable 400V voltage. In this working mode, the conduction loss of the bridge rectifier is cancelled, and the overall working efficiency is significantly improved.

[0073] Specifically, taking one branch as an example, when Q3 is turned off and Q4 is turned on, the current flows from the DC input positive pole to the inductor L1, Q4, Q8 and returns to the DC input negative pole, and the electric energy is mainly stored in L1, and C1 is responsible for discharging to the load and the secondary side power supply control module to maintain the voltage. When Q3 is turned on and Q4 is turned off, the current path is DC input positive pole, L1, Q3, C1, Q9, Q8 and returns to the DC input negative pole. It can be understood that, when Q4 is turned off and Q3 is turned on, the inductor L1 will generate a left positive and right negative induced electromotive force to maintain its current unchanged. This induced voltage is superimposed in series with the input power supply voltage, and together passes through the turned-on Q3 to supply power to the output capacitor C1 and the load. Thus, the output voltage is raised to a stable value (400V) higher than the input voltage. In this stage, the inductor releases the energy stored in the previous stage, and Q5 and Q6 are alternately controlled.

[0074] In an example embodiment, after the multi-mode conversion module is switched to the target working mode, the control method of the server power supply further comprises: acquiring an input voltage signal of the power supply conversion circuit, determining whether the power supply mode switching condition is met through the input voltage signal; if yes, re-determining the target working mode from the preset multiple working modes according to the input voltage signal.

[0075] In this embodiment, the control module continuously or periodically performs sampling and signal conditioning in the background, which is consistent with the initial judgment process. The power supply mode switching condition is a preset logical judgment criterion, usually based on two levels: one is whether the amplitude of the input voltage continuously exceeds the allowed working window of the current mode (such as the DC input voltage falling from 380V to 350V); the second is whether the type of input power has fundamentally changed (such as from stable DC to AC with power frequency ripple). Once the switching condition is triggered, the current control logic is immediately interrupted, the mode recognition algorithm (such as S102 step) is re-executed, and the new optimal working mode is smoothly switched. This ensures that the system can respond to the dynamic changes of the input source, such as fluctuations in new energy input or switching between mains and backup power.

[0076] Assuming that the system is currently running in the DC short path mode, the input voltage is stable at 410V. The background task in the control module performs voltage sampling and judgment every 10ms. Continuous monitoring and condition judgment: at a certain time, due to changes in the front-end power supply, the input voltage begins to continuously decrease. The control module monitors that the voltage is lower than 380V (the lower limit of the first preset range) in several consecutive cycles, that is, it meets the preset power supply mode switching condition (the amplitude of the voltage exceeds the current mode range). Redetermine and smoothly switch: the control module immediately starts the mode re-determination process. It analyzes the latest voltage signal and finds that it is still DC (no zero crossing and power frequency ripple), but the value has fallen into the second preset range (such as 300V). Therefore, it re-determines the target working mode as the DC boost mode. Subsequently, the control module orderly executes the mode switching sequence: first, adjust the drive signal, turn off the switch tubes of the short path (such as the upper tubes of the first and second bridge arms); then, reconfigure the lower tube of the third bridge arm as always on and the upper tube as always off; finally, apply complementary fourth drive signals (PWM) to the switch tubes of the first and second bridge arms to start the boost operation. The entire switching process will be completed within milliseconds and uses a soft start strategy to ensure that the output voltage does not interrupt or fluctuate dramatically.

[0077] This embodiment makes the power supply system from static compatibility upgrade to dynamic self-adaptation, improves the robustness and reliability of the system. It can respond to abnormal fluctuations or accidental switching of the input source (such as the backup battery after the mains power is cut off) in real time, automatically select the most suitable working mode, and ensure the continuity and stability of the power supply to the rear-end load, meeting the needs of high-availability devices such as servers. Secondly, it realizes the optimal management of energy in the whole working range. Instead of selecting a mode only once at power-on, the system continuously tracks the input state and always makes the power conversion components work in the most efficient mode (short path when short path, boost when boost), thereby maximizing overall energy efficiency and reducing operating loss. Finally, this closed-loop adaptive control strategy embodies true intelligence, reducing dependence on external monitoring units.

[0078] In an exemplary embodiment, after determining whether the power supply mode switching condition is met by the input voltage signal, the control method of the server power supply further comprises: if the power supply mode switching condition is not met, determining whether a fault trigger instruction or a shutdown instruction is received; if yes, performing a standby operation.

[0079] In this embodiment, the fault trigger instruction is a digital signal sent by a system internal protection circuit (such as over-temperature protection, over-current protection, output short-circuit protection) or an external monitoring unit (such as a motherboard BMC), indicating that the power conversion module should immediately stop normal operation to avoid risks. The shutdown instruction is a legal power-off command from a system upper management unit (such as a server motherboard), requiring the power supply to enter a soft shutdown process. Assuming that the system is currently normally operating in an AC rectification and voltage boost mode. After completing a monitoring cycle, the control module confirms that the input voltage is stable at 220VAC, and the power supply mode switching condition is not met.

[0080] Subsequently, it continues to perform subsequent judgments: checking faults and instructions: the control module queries its internal fault flag register and external instruction communication interface (such as PMBus, I2C). If the over-temperature flag bit from the temperature sensor is set (fault trigger instruction) or the “immediate shutdown” command from the host is received from the I2C bus (shutdown instruction), the standby process is triggered. Perform standby operation: the control module immediately starts an orderly shutdown sequence: disconnect power output: first, set all PWM drive signals sent to all main switching tubes (such as the first and second switching tubes, switching tubes on the bridge arm) to the second drive signal (low level), forcing them to be disconnected and stopping energy conversion. Release energy storage: control the discharge circuit (if any) or slowly release the stored energy in the output capacitor through a small duty cycle PWM to safely lower the output voltage. After the main power circuit is turned off, the control module itself switches to a low-power running mode, only retaining necessary circuits (such as instruction receiving interfaces, standby wake-up circuits) working, and continuously monitoring whether the fault state is removed or whether there is a power-on instruction. At the same time, the “standby” state is reported to the host through the state pin or communication bus.

[0081] The embodiment mainly focuses on solving the demand of energy efficiency improvement in new high-voltage direct current power supply application by identifying the application compatibility demand of different power supply environments in the server power supply application. The intelligent control mode switching can be realized for the alternating current and direct current power supply environment by the new hardware design architecture combined with different control strategies. The conversion efficiency of the power supply in different working modes can be effectively improved. The main working modes include the bridgeless power factor correction design in the alternating current power supply mode, the short-pass working mode in the 360V-420V high-voltage direct current power supply mode to realize the change of the power supply from two-stage power conversion to one-stage power conversion, the direct current boost mode in the 360Vdc power supply scene, and the boost mode in which the energy efficiency can be improved synchronously due to the solution of the loss problem of the existing bridge rectifier. Based on the patent design, the high energy efficiency conversion of the single server power supply in the multi-input mode can be realized, and the automatic switching is realized for different inputs. The embodiment of the application further provides an electronic device including a memory and a processor, the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in the server power supply control method embodiments.

[0082] The embodiment of the application further provides a computer readable storage medium, which stores a computer program, and the computer program is configured to execute the steps in the server power supply control method embodiments when running.

[0083] In an example embodiment, the computer readable storage medium can include, but is not limited to, a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store computer programs.

[0084] The embodiment of the application further provides a computer program product, which includes a computer program, and the computer program is executed by a processor to realize the steps in the server power supply control method embodiments.

[0085] The embodiment of the application further provides another computer program product, which includes a non-volatile computer readable storage medium, and the non-volatile computer readable storage medium stores a computer program, and the computer program is executed by a processor to realize the steps in the server power supply control method embodiments.

[0086] Those skilled in the art will further realize that the mere conception of the examples described herein is sufficient to enable practitioners to practice the examples as further described below. Therefore, numberous variations and modifications can be made to the examples described and illustrated herein without departing from the scope of the application. Accordingly, all such variations and modifications are intended to be included within the scope of the application as defined in the appended claims, along with all equivalents thereof.

[0087] The above provides a power conversion circuit, a server power supply, a method, an equipment, a product and a medium. The principles and implementation manners of the application are described by using specific examples. The above description of the examples is only used to help understand the method and the core idea of the application. It should be pointed out that, for those skilled in the art, some improvements and modifications can be made to the application without departing from the principles of the application. These improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A power conversion circuit, characterized by, include: An input detection module is connected to an input power supply and configured to sample the voltage signal of the input power supply. The multi-mode conversion module includes multiple switching transistors configured to switch to the corresponding operating mode in response to control signals; The control module is electrically connected to the input detection module and the multimode conversion module, and is configured to receive the voltage signal, identify the power supply mode of the input power supply based on the voltage signal, determine the working mode of the multimode conversion module according to the power supply mode, and generate a multi-channel drive signal corresponding to the working mode to control the switching state of multiple switching transistors in the multimode conversion module; The multimodal conversion module includes: The mode switching unit includes a first switch and a second switch, the first end of the first switch and the first end of the second switch are connected, and the control end of the first switch and the control end of the second switch are both connected to the control module. The voltage regulation unit includes three bridge arms, each of which includes an upper switch and a lower switch. The second end of the first switch is connected to the common terminal of the upper and lower switches in the first bridge arm. The second end of the second switch is connected to the common terminal of the upper and lower switches in the second bridge arm. The control terminal of each switch is connected to the control module. The multi-mode conversion module further includes a first inductor and a second inductor, wherein the first inductor is connected in parallel between the first terminal and the second terminal of the first switching transistor, and the second inductor is connected in parallel between the first terminal and the second terminal of the second switching transistor; The control module is specifically configured such that if the power supply mode of the input power supply is identified as AC power supply mode, the operating mode is determined to be AC ​​rectification boost mode; if the power supply mode of the input power supply is identified as a first DC power supply mode, the operating mode is determined to be DC short-circuit mode; and if the power supply mode of the input power supply is identified as a second DC power supply mode, the operating mode is determined to be DC boost mode. The voltage signal of the DC power supply in the first DC power supply mode is within a first preset range, and the voltage signal of the DC power supply in the second DC power supply mode is lower than the lower limit of the first preset range.

2. The power supply conversion circuit of claim 1, wherein, The multimodal conversion module also includes a soft starter unit, which is located at the first common connection end of the three bridge arms or the second common connection end of the three bridge arms.

3. The power supply conversion circuit of claim 2, wherein, The soft start unit includes a third switching transistor and a resistor connected in parallel with the third switching transistor.

4. The power supply conversion circuit of claim 3, wherein, It also includes a capacitor, the first end of which is connected to the first common connection terminal, and the second end of which is connected to the second common connection terminal.

5. A server power supply, comprising: It includes a primary-side power control module and a secondary-side power control module, wherein the primary-side power control module includes the power conversion circuit as described in any one of claims 1-4.

6. A control method of a server power supply, characterized by, The server power supply includes the power conversion circuit as described in any one of claims 1-4, and the control method of the server power supply includes: Obtain the input voltage signal of the power conversion circuit; The target operating mode is determined from a set of preset operating modes based on the input voltage signal; A multi-mode conversion module is generated based on the target working mode and applied to the power supply conversion circuit, so as to switch the multi-mode conversion module to the target working mode.

7. The control method of a server power supply according to claim 6, wherein The process of obtaining the input voltage signal of the power supply conversion circuit comprises: obtaining the input voltage signal of the power supply conversion circuit within a preset time period; The process of determining the target working mode from the preset working modes according to the input voltage signal comprises: If the input voltage signal within the preset time period meets the AC determination condition, the target working mode is determined as the AC rectification and boost mode.

8. The control method of a server power supply according to claim 7, wherein The multi-mode conversion module comprises a mode switching unit, a voltage regulation unit and a soft start unit, the mode switching unit comprises a first switch tube and a second switch tube, the voltage regulation unit comprises three bridge arms, each bridge arm comprises an upper switch tube and a lower switch tube, and the soft start unit comprises a third switch tube; The process of generating a plurality of driving signals based on the target working mode and applying the driving signals to the multi-mode conversion module of the power supply conversion circuit comprises: When the target working mode is the AC rectification and boost mode, a first driving signal is output to the first switch tube and the second switch tube, so that the first switch tube and the second switch tube are turned off; A soft start driving signal is output to the third switch tube, and after the soft start is completed, a second driving signal is output to the third switch tube, so that the third switch tube is turned on; A third driving signal is output to the target switch tube combination of the three bridge arms, so as to perform voltage conversion operation and / or power factor correction operation.

9. The control method of a server power supply according to claim 6, wherein The process of obtaining the input voltage signal of the power supply conversion circuit comprises: obtaining the input voltage signal of the power supply conversion circuit within a preset time period; The process of determining the target working mode from the preset working modes according to the input voltage signal comprises: If the input voltage signal within the preset time period meets the DC determination condition, it is determined whether the input voltage signal is within a first preset range; If yes, it is determined that the target working mode is the DC short-pass mode.

10. The control method of a server power supply according to claim 9, wherein The multi-mode conversion module comprises a mode switching unit, a voltage regulation unit and a soft start unit, the mode switching unit comprises a first switch tube and a second switch tube, the voltage regulation unit comprises three bridge arms, each bridge arm comprises an upper switch tube and a lower switch tube, and the soft start unit comprises a third switch tube; The process of generating a plurality of driving signals based on the target working mode and applying the driving signals to the multi-mode conversion module of the power supply conversion circuit comprises: When the target working mode is the DC short-pass mode, a second driving signal is output to the first switch tube, the second switch tube, the upper switch tube of the first bridge arm, the upper switch tube of the second bridge arm and the lower switch tube of the third bridge arm, so that the first switch tube, the second switch tube, the upper switch tube of the first bridge arm, the upper switch tube of the second bridge arm and the lower switch tube of the third bridge arm are turned on; The first driving signal is output to the lower switch tube of the first bridge arm, the lower switch tube of the second bridge arm, and the upper switch tube of the third bridge arm, so that the lower switch tube of the first bridge arm, the lower switch tube of the second bridge arm, and the upper switch tube of the third bridge arm are turned off.

11. The control method of a server power supply according to claim 9, wherein After judging whether the input voltage signal is in the first preset range, the control method of the server power supply further comprises: If the input voltage signal is not in the first preset range, it is judged whether the input voltage signal is in a second preset range, and an upper limit value of the second preset range is less than a lower limit value of the first preset range. If yes, it is determined that the target working mode is a direct current boosting mode.

12. The control method of a server power supply according to claim 11, wherein The multi-mode conversion module comprises a mode switching unit, a voltage regulating unit and a soft start unit, the mode switching unit comprises a first switch tube and a second switch tube, the voltage regulating unit comprises three bridge arms, each bridge arm comprises an upper switch tube and a lower switch tube, and the soft start unit comprises a third switch tube. The process of generating a plurality of driving signals based on the target working mode and applying the plurality of driving signals to the multi-mode conversion module of the power supply conversion circuit comprises: When the target working mode is a direct current boosting mode, a first driving signal is output to the first switch tube and the second switch tube, so that the first switch tube and the second switch tube are turned off. A second driving signal is output to the third switch tube, so that the third switch tube is turned on. A second driving signal is output to the lower switch tube of the third bridge arm, so that the lower switch tube of the third bridge arm is turned on. A first driving signal is output to the upper switch tube of the third bridge arm, so that the upper switch tube of the third bridge arm is turned off. A fourth driving signal is output to the upper switch tube and the lower switch tube of the first bridge arm and the upper switch tube and the lower switch tube of the second bridge arm, so as to control the upper switch tube and the lower switch tube of the first bridge arm to perform complementary switching operations and control the upper switch tube and the lower switch tube of the second bridge arm to perform complementary switching operations.

13. The control method of a server power supply according to claim 6, wherein After switching the multi-mode conversion module to the target working mode, the control method of the server power supply further comprises: An input voltage signal of the power supply conversion circuit is acquired, and it is judged whether the power supply mode switching condition is met through the input voltage signal. If yes, a target working mode is re-determined from a plurality of preset working modes according to the input voltage signal.

14. The control method of a server power supply according to claim 13, wherein After judging whether the power supply mode switching condition is met through the input voltage signal, the control method of the server power supply further comprises: If the power supply mode switching condition is not met, it is judged whether a fault triggering instruction or a shutdown instruction is received. If yes, a standby operation is performed.

15. A computer program product comprising computer programs / instructions, characterized in that, The computer program / instruction is executed by the processor to realize the steps of the control method of the server power supply in any one of claims 9-14.

16. An electronic device, comprising: Comprise: A memory for storing a computer program; A processor for executing the computer program to realize the steps of the control method of the server power supply in any one of claims 9-14.

17. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the steps of the control method of the server power supply according to any one of claims 9-14.

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